Shuttle box for pile-fabric looms



Dec. 11, 1923. 1,476,843

7 w. w. ROBERTSON SHUTTLLE BOX FOR FILE FABRIC .LOOMS Filed Sept. 25, 1 922 2 sheetsrsheet 1 Dec. 11 1923. v 1 1,476,843

W. W. ROBERTSON SHUTTLE BOX FOR P ILE FABRIC LOOMS Filed Sept. 25. 1922 2 Sheets-Sheet 2 llllllllllllll 11MMMJ 16111011115. 11011111111 Patented Dec. 11, 1923.

UNITED sr'rss 1,4?t,843 smear OFFICE.

WILLIAM W. ROBERTSON, OF VVOBCESTER, MASSACHUSETTS, ASSIGNOR TO CROIVIPTON & KNOWLES LOOM WORKS, A CORPORATION OF MASSACIIUSETTS.

SHUTTLE BOX FOR FILE-FABRIC LOOlVIS.

Application filed September 25, 1922.

To all whom it may concern:

Be it known that I, WILLIAM N. ROBERT- SON, a citizen of Canada, residing at VVorcester, in the county of i Vorcester and State of Massachusetts, have invented a new and useful Shuttle Box for Pile-Fabric Looms, of which the following is a specification.

This invention relates to looms for weaving pile fabric, of the type in which the lay end has a different range of movement from the remaining portions of the lay. My invention relates particularly to an improved construction of shuttle box by which injury to a misplaced shuttle may be prevented.

In pile fabric looms ofthis type, as shown for instance in the patent to Hutchins, No. 686,970, issued November 19, 1901, the shuttle box and lay end at one side of the loom is halted in its forward movement while the remaining portions of the lay move further forward to permit withdrawal and insertion of the pile wires. It sometimes happens that a shuttle will fail to enter the shuttle box sufficiently to clear theforwardly moving lay, in which case a broken shuttle or a damaged shuttle box has usually resulted, as the forward movement is continued.

It is the general object of my invention to provide means by which such damage may be prevented, preferably in the form of a yielding front box plate member for the shuttle box on the movable lay end.

With this general object in view, my invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings in which Fig. 1 is a side elevation of parts of a loom embodying my improvements;

Fig. 2 is a side elevation of certain of these parts in a different position;

Figs. 3 and t are plan views of the movable lay end and a portion of the-lay, in different relative positions;

Fig. 5 is a front elevation of the parts shown in Fig. 3; and

Fig. 6 is a sectional side elevation taken along the line 6-6 in Fig. 5.

Referring particularly to Figs. 1 and 2, I have shown parts of a pile fabric loom which is in general of a usual type and Serial no. 590,200.

comprises a loom frame 10 on which are pivotally mounted the swords 11 which support the lay 12. The swords 11 are actuated by toggle links 13 mounted at their rear ends on a fixed pivot 14 and connected by a link 15 to a crank arm 16 on the crank shaft 17. As the crank shaft 17 rotates, the toggle links are moved from the position shown in Fig. l, to that shown in Fig. 2, thus advancing the lay to its extreme for- Ward position. As the shaft 17 continues to rotate, the links ll are forced slightly above their central position, thus slightly withdrawing and thereafter again advancing the lay to produce the usual double-beat action desired in such looms.

The movable lay end 20 is mounted on arms or supports 21 loosely pivoted to swing about the shaft 22 upon which the swords 11 are mounted. A bracket 23 projects rearward from the lay end support and is provided with a cam roll 2 1 positioned for engagement with a side cam 25 upon the crank shaft 17. The cam is so designed that the lay end 20 will move with the lay 12 until the lay end reaches the position shown in Fig. 2, at which point a dwell of the cam permits the lay end 20 to remain at rest while the lay 12 advances to its extreme forward position. The mechanism thus far described is of a usual type and constitutes no part of my present invention.

In the preferred embodiment of my invention, the lay end is provided with a fixed back box plate 26 to which a binder 27 is pivoted and with a twopiece front box plate comprising the members 28 and 29. The member 28 is fixed to the lay end 20 and the member 29 is pivoted at 30 to the end of the member 28.

The inner end of the member 29 is yieldingly movable forwardly, as indicated in Fig. 1, and is normally maintained in operative position by a spring 31 connected at one end to a depending lug 32 on the member 29 and at the other end to the lay end 29. Provision is shown for adjusting the tension of the spring 31 and a stop screw 33 is provided for limiting inward movement of the member 29. A stud 34: extending through a slotted guide 35 assists in retaining the member 29 in the desired relation with the lay end 20.

The spring 31 is of substantially greater strength than the binder spring, thus causing the members 28 and 29 to cooperate as a fixed front box plate under normal conditions, as indicated in Fig. 2. If, however, the shuttle fails to clear the lay 12, as indicated in Fig. 4, the box plate member 29 yields forwardly to prevent injury to the shuttle or to other parts of the loom.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein shown, other- WVISO than as set forth in the claims, but

3. In a loom having a lay and a relatively movable lay end, a shuttle box having a. yielding binder and having a movable front box platemember also yieldingly mounted.

4. In a loom having a lay and a relatively movable lay end, a. shuttle box having a binder at its rear side and having a twopart box plate at the front side, one member of said box plate being yieldingly mounted.

5. In a loom having a lay and a relatively movable lay end, a shuttle box having a binder at its rear side and having a twopart box plate at the front side, one member of said box plate being fixed to the lay end and the second member being yieldingly mounted and being pivoted at one end to said first member.

In testimony whereof I have hereunto aflixed my signature.

\VILLIAM \V. Rt) BERTSON. 

